Beef Roast selection

[Elf@shore]

Hi folks looking to maybe try some cheaper Beef cuts :
For RB and maybe steak sandwiches ?
Not looking to grind it or stew meat.
Rump roast very happy with is, along with bottom round.
Question :? how do these stack up? Thinking they are too lean and will be dry and tough?
Looking to slow roast or marinate and pan fry for Sammys ?
Eye round roast
Sirloin tip roasts and cut steaks?
Have not used any of these?
Any ideas please?
Thanks !
ELF